Lubricating apparatus



, 1,672,972 0. ZERK, NOW BY JUDICIAL CHANGE OF NAME 0. u. ZERK' June 12, 1928.

LUBRIGATING APPARATUS Filed March 14. 1921 9 3 7 .1 e a 8 j v 6 a i p L 7 JV/A /A/ 3 AAHrIV/d V/V V/////A V T 4 I, J /////7// 3 MY L 4 a E 3 w 9 2 7 1 6 j Patented June 12, 1928.

UNITED STATES 1,672,972 PATENT OFFICE.

OSCAR ZEBK, NOW BY JUDICIAL CHANGE OF NAME OSCAR ULYSSES ZERK, OF CLEVE- LAND, OHIO, ABSIGNOB,'BY MESNEASSIGNMENTS, TO THE BABSICK MANUFACTUR- ING COMPANY.

' runmcarme arr'aaarus.

Application filed March 14', 1921, Serial No. 452,124.

My invention relates to lubricating apparatus, and is particularly concerned withgrease or oil cups of the reservoir type in which a' quantity of lubricant is radually forced from the cup to the bearing y means of a spring'actuated piston.

An object of my invention is to provide ane w and improved lubricantcup of the reservoir type.

Another ob ect 1s toprovide a reservoir cup which may be cheaply manufactured.

Another object is to provide an automatically feeding lubricant .cup which only requires to be filled with lubricant and which will then feed the lubricant to the bearin without further attention.

Another object is to provide a device in which the threaded ortions are allof small diameter,

facilitated.

Other objects and advantages will appear,

as the description proceeds cal sectional view of The single figure of the drawing is a vertithe device on an'en 'lar ed scale.

he device, in general,'comprises a lubricant chamber, an inlet passageway leading thereto and provided with a check valve therein for admitting the lubricant'and preventin its escape, and' means for automatically orcing the lubricant through an outlet passage connecting the lubricantchamber witha part to beylubricated. o

My new and im roved reservoir cup has a base member 1 w ich forms one end of the" lubricant reservoir and is provided with a hollow threaded nipple 2which serves to secure the cuprto a part to be lubricated and which also provides anoutlet passa e connecting the lubricant chamber with t e part to be lubricated. Mounted on-the base 1 are the cover or dome 3 and interliner 4 having laterally projecting flanges 5 and 6, respectively, firmly clam ed to the base 1 by the bent over portion thereof. The domeor cover 3 has a large cylindrical part 8 surrounding the interliner 4 and a smaller thereof.

whereby t e use of drawn steel is eter than the enlarged part 8 of the cover 3, thus providing a passageway 12 there-between which passageway communicates with the inlet opening ll and with the lubricant chamber 13 by means of openings 14 through the interliner and adjacent the lower edge The topportion 15 of the interliner abuts the cover or dome at 16 and at 131115 point I provide a vent 17 which connects thexupper portion of theichamber formed in the interliner 4 with the atmosphere.

Within the chamber formed by the interliner 4 I mount .;a piston member composed of an upper cup plate 18, a cup leather 19 anda retainingiring 20. The cupped plate 18 may have a circumferential ro ection 21 formed'to retain the ring 20 and cup leather 19 in position. A spring 22 is rdvided for forcing the piston downward y to create pressure in the chamber and feed the lubricant to the bearing. One end of this spring seats in the cupped portion of the plate 18 and the other end rests against the portion 15 of the interliner 4, being maintainecl'in central position by the downwardly projectpart 23 of the portion 15.

The inlet opening 11 is normally closed by a check valve which in the present form is illustrated as comprising a washer 24 of suitable material for effectin aseal with that portion of the end 10 which surrounds the opening-11. This washer is attached to a cup 25 pressed upwardly by a spring 26 having its lower end resting in the depressed art 23 of the upper portion of the interiner. In order to more eifectivel exclude dust and dirt from the interior 0 my new and improved lubricant cup, I provide a dust cap 27 which normall surrounds and covers the inlet end of t e cup. I have shown this dust cap as attached by means of a chain 28 to a rin 29 firmly held in a groove formed int e upper end of the cover 3.

The operation of my, invention is as follows: The dust cap 27 is first removed from the inlet end of the on and said inlet connected to a source of In ricant su ply. The lubricant is forced throu h the in at opening 11 urging the check va ve comprising the washer 24 and cup 25, against the action of the springl 26, thus perinittin the lubricant to pass t rough said inlet, own the passageway 12 formed between the cover 3 and interliner 4, and through the openings 14 into the chamber 13 where the lubricant will force the piston 18 upwardly against the tension of the spring 22, the air escaping from above the piston through the vent 17. During the filling operation some lubricant may befed to thebearing and after the chamber 13 has been filled with lubricant,

this lubricant is fed to the bearing by the spring actuated piston 18 which continues to feed lubricant to the bearing until the part 30 thereof contacts with the projections 31 formed on the base 1. These projections limit the downward movement of the pis ton 18 and stop said piston in such a position that there is clearance between the underside of the piston and the base 1 so that the fresh charge of lubricant forced through the 'inlet 11 may act on the entire under side of the piston and force it upward against the tension of the spring 22.

Itwill be seen that I have provided a dovice in which all of the threaded members are of small diameter. This is important where the parts are to be made of drawn steel, as it is difficult and expensive to form 1 accurate threads on a member of large dichamber, said piston having, a laterally extending flange and a depression within said flange, a cup-leather sealing ring having a downwardly turned peripheral portion and carried on the laterally extending flange, the downwardly turned portion making contact at its periphery with the side walls of the chamber, and an upper portion seated onthe laterally extending flange, a compression spring having its lower portion extending within said depression in the piston and its upper-portion pressing against the upper wall of the chamber, anda lubricant conducting member'extending abovethe upper wall of the chamber and adapted to communicate lubricant under pressure to the under side of the piston to raise said piston, compressing said spring and causing a sealing by the leather ring between the piston and 'the side walls of the chamber.

2. A grease cup comprising a chamber having an axial outlet and a peripheral inlet at the same end, a conducting member having an external axial inlet opposite said outlet and extendin to said chamber inlet, a piston in said c amber spring pressed toward the outlet, and a spring pressed check valve in said external inlet.

3. A grease cup comprising a chamber having an axialoutlet and a peripheral inlet at the same end, a conducting member having an external axial inlet opposite said outlet and extending to said chamber inlet, a piston in said chamber, a check valve in said external inlet, said piston having a central cup opening toward said external inlet, said chamber having a smaller cup axially in line with said first cup and opening toa ward said external inlet, a compression spring socketed by both said cups for pressing said piston toward the outlet, and a compression spring socketed at one end by said chamber cup for holding said check V3.1"8 closed.

4. A greasecup comprising a chamber having an axialoutlet and a peripheral in let at the same end, a conducting member having an external axial inlet opposite said outlet and extending to said chamber inlet, a piston in said chamber, a check valvein said external inlet, said piston having a central on opening toward said external inlet, said chamber havinga cup axially in line with said first cup, a compression sprin socketed by both said cups for pressing saiil piston toward the outlet, and accmpression spring socketed at one end by said chamber cup for holding said check valve closed.

5. A grease cup comprising a cylindrical chamber, an axially slidable piston therein,-

resilient means pressing on sald piston, said chamber having an axial outlet and peripheral inlet at the same end, and a cover member defining an axial receiving connection outside said chamber at the end 0 posite said outlet, and an annular passage said connection to said inlet.

6. A grease cup comprising a chamber, said chamber having an axial outlet and a peripheral inlet at the same end, and a cover member defining an axial receiving connection outside said chamber at the end opposite said outlet, and a passage from said connection to said inlet.

In testimony whereof, I hereunto afiix my signature.

OSCAR ZERK,

Now .by, change of name Oscar Ulysses Zerk. 

